java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/transmitter.06.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:16:24,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:16:24,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:16:24,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:16:24,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:16:24,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:16:24,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:16:24,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:16:24,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:16:24,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:16:24,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:16:24,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:16:24,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:16:24,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:16:24,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:16:24,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:16:24,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:16:24,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:16:24,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:16:24,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:16:24,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:16:24,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:16:24,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:16:24,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:16:24,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:16:24,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:16:24,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:16:24,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:16:24,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:16:24,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:16:24,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:16:24,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:16:24,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:16:24,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:16:24,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:16:24,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:16:24,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:16:24,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:16:24,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:16:24,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:16:24,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:16:24,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 17:16:25,009 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:16:25,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:16:25,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:16:25,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:16:25,012 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:16:25,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:16:25,012 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:16:25,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:16:25,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:16:25,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:16:25,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:16:25,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:16:25,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:16:25,015 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:16:25,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:16:25,015 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:16:25,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:16:25,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:16:25,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:16:25,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:16:25,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:16:25,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:16:25,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:16:25,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:16:25,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:16:25,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:16:25,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:16:25,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:16:25,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 17:16:25,338 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:16:25,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:16:25,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:16:25,356 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:16:25,356 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:16:25,357 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.06.cil.c [2019-10-07 17:16:25,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7db0c369/3f72b6492c724fbc81874843857e4961/FLAGeb66806f7 [2019-10-07 17:16:25,896 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:16:25,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.06.cil.c [2019-10-07 17:16:25,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7db0c369/3f72b6492c724fbc81874843857e4961/FLAGeb66806f7 [2019-10-07 17:16:26,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7db0c369/3f72b6492c724fbc81874843857e4961 [2019-10-07 17:16:26,264 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:16:26,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:16:26,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:16:26,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:16:26,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:16:26,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663c421b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26, skipping insertion in model container [2019-10-07 17:16:26,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,282 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:16:26,339 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:16:26,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:16:26,710 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:16:26,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:16:26,875 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:16:26,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26 WrapperNode [2019-10-07 17:16:26,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:16:26,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:16:26,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:16:26,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:16:26,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... [2019-10-07 17:16:26,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:16:26,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:16:26,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:16:26,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:16:26,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:16:27,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:16:27,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:16:27,029 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:16:27,029 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:16:27,029 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:16:27,030 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-07 17:16:27,031 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-07 17:16:27,031 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-07 17:16:27,031 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2019-10-07 17:16:27,031 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2019-10-07 17:16:27,031 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:16:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:16:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:16:27,034 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:16:27,034 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:16:27,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:16:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:16:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:16:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:16:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:16:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:16:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-07 17:16:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-07 17:16:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-07 17:16:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2019-10-07 17:16:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2019-10-07 17:16:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:16:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:16:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:16:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-07 17:16:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-07 17:16:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-07 17:16:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2019-10-07 17:16:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2019-10-07 17:16:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:16:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:16:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:16:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:16:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:16:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:16:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:16:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:16:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:16:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:16:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:16:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:16:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:16:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:16:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:16:28,533 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:16:28,537 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-07 17:16:28,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:16:28 BoogieIcfgContainer [2019-10-07 17:16:28,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:16:28,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:16:28,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:16:28,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:16:28,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:16:26" (1/3) ... [2019-10-07 17:16:28,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e618c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:16:28, skipping insertion in model container [2019-10-07 17:16:28,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:16:26" (2/3) ... [2019-10-07 17:16:28,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e618c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:16:28, skipping insertion in model container [2019-10-07 17:16:28,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:16:28" (3/3) ... [2019-10-07 17:16:28,554 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2019-10-07 17:16:28,566 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:16:28,575 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:16:28,586 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:16:28,621 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:16:28,621 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:16:28,621 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:16:28,621 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:16:28,622 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:16:28,622 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:16:28,622 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:16:28,622 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:16:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states. [2019-10-07 17:16:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 17:16:28,671 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:28,673 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:28,677 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:28,685 INFO L82 PathProgramCache]: Analyzing trace with hash -767649143, now seen corresponding path program 1 times [2019-10-07 17:16:28,696 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:28,696 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:28,697 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:28,697 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:29,209 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:29,210 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:29,211 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:29,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:29,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:29,235 INFO L87 Difference]: Start difference. First operand 191 states. Second operand 4 states. [2019-10-07 17:16:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:29,744 INFO L93 Difference]: Finished difference Result 532 states and 745 transitions. [2019-10-07 17:16:29,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:29,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-07 17:16:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:29,776 INFO L225 Difference]: With dead ends: 532 [2019-10-07 17:16:29,776 INFO L226 Difference]: Without dead ends: 345 [2019-10-07 17:16:29,789 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-10-07 17:16:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 341. [2019-10-07 17:16:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-10-07 17:16:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 445 transitions. [2019-10-07 17:16:29,877 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 445 transitions. Word has length 96 [2019-10-07 17:16:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:29,878 INFO L462 AbstractCegarLoop]: Abstraction has 341 states and 445 transitions. [2019-10-07 17:16:29,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 445 transitions. [2019-10-07 17:16:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 17:16:29,883 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:29,884 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:29,884 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:29,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1364338890, now seen corresponding path program 1 times [2019-10-07 17:16:29,885 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:29,885 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:29,885 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:29,885 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:30,105 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:30,105 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:30,106 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:30,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:30,109 INFO L87 Difference]: Start difference. First operand 341 states and 445 transitions. Second operand 4 states. [2019-10-07 17:16:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:30,446 INFO L93 Difference]: Finished difference Result 982 states and 1353 transitions. [2019-10-07 17:16:30,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:30,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-07 17:16:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:30,454 INFO L225 Difference]: With dead ends: 982 [2019-10-07 17:16:30,454 INFO L226 Difference]: Without dead ends: 657 [2019-10-07 17:16:30,457 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-07 17:16:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 652. [2019-10-07 17:16:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-10-07 17:16:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 848 transitions. [2019-10-07 17:16:30,523 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 848 transitions. Word has length 96 [2019-10-07 17:16:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:30,523 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 848 transitions. [2019-10-07 17:16:30,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 848 transitions. [2019-10-07 17:16:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 17:16:30,526 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:30,527 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:30,547 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:30,548 INFO L82 PathProgramCache]: Analyzing trace with hash 186364329, now seen corresponding path program 1 times [2019-10-07 17:16:30,548 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:30,548 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:30,548 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:30,549 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:30,649 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:30,649 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:30,649 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:30,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:30,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:30,651 INFO L87 Difference]: Start difference. First operand 652 states and 848 transitions. Second operand 4 states. [2019-10-07 17:16:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:31,035 INFO L93 Difference]: Finished difference Result 1907 states and 2620 transitions. [2019-10-07 17:16:31,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:31,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-07 17:16:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:31,051 INFO L225 Difference]: With dead ends: 1907 [2019-10-07 17:16:31,051 INFO L226 Difference]: Without dead ends: 1271 [2019-10-07 17:16:31,056 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2019-10-07 17:16:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1264. [2019-10-07 17:16:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264 states. [2019-10-07 17:16:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1638 transitions. [2019-10-07 17:16:31,175 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1638 transitions. Word has length 96 [2019-10-07 17:16:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:31,176 INFO L462 AbstractCegarLoop]: Abstraction has 1264 states and 1638 transitions. [2019-10-07 17:16:31,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1638 transitions. [2019-10-07 17:16:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 17:16:31,183 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:31,183 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:31,184 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:31,184 INFO L82 PathProgramCache]: Analyzing trace with hash -844966486, now seen corresponding path program 1 times [2019-10-07 17:16:31,184 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:31,185 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:31,186 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:31,186 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:31,357 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:31,357 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:31,357 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:31,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:31,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:31,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:31,358 INFO L87 Difference]: Start difference. First operand 1264 states and 1638 transitions. Second operand 4 states. [2019-10-07 17:16:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:31,772 INFO L93 Difference]: Finished difference Result 3727 states and 5116 transitions. [2019-10-07 17:16:31,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:31,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-07 17:16:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:31,792 INFO L225 Difference]: With dead ends: 3727 [2019-10-07 17:16:31,792 INFO L226 Difference]: Without dead ends: 2479 [2019-10-07 17:16:31,801 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2019-10-07 17:16:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2468. [2019-10-07 17:16:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2468 states. [2019-10-07 17:16:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3192 transitions. [2019-10-07 17:16:31,971 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3192 transitions. Word has length 96 [2019-10-07 17:16:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:31,972 INFO L462 AbstractCegarLoop]: Abstraction has 2468 states and 3192 transitions. [2019-10-07 17:16:31,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3192 transitions. [2019-10-07 17:16:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 17:16:31,974 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:31,975 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:31,975 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1718444181, now seen corresponding path program 1 times [2019-10-07 17:16:31,976 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:31,976 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:31,976 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:31,977 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:32,066 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:32,066 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:32,067 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:32,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:32,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:32,069 INFO L87 Difference]: Start difference. First operand 2468 states and 3192 transitions. Second operand 3 states. [2019-10-07 17:16:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:32,387 INFO L93 Difference]: Finished difference Result 7320 states and 10195 transitions. [2019-10-07 17:16:32,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:32,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-07 17:16:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:32,430 INFO L225 Difference]: With dead ends: 7320 [2019-10-07 17:16:32,431 INFO L226 Difference]: Without dead ends: 4868 [2019-10-07 17:16:32,450 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2019-10-07 17:16:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4868. [2019-10-07 17:16:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4868 states. [2019-10-07 17:16:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 6635 transitions. [2019-10-07 17:16:32,955 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 6635 transitions. Word has length 96 [2019-10-07 17:16:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:32,957 INFO L462 AbstractCegarLoop]: Abstraction has 4868 states and 6635 transitions. [2019-10-07 17:16:32,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 6635 transitions. [2019-10-07 17:16:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-07 17:16:32,975 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:32,976 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:32,976 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:32,977 INFO L82 PathProgramCache]: Analyzing trace with hash 942542599, now seen corresponding path program 1 times [2019-10-07 17:16:32,977 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:32,977 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:32,978 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:32,978 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 17:16:33,102 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:33,102 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:33,103 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:16:33,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:33,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:33,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:33,105 INFO L87 Difference]: Start difference. First operand 4868 states and 6635 transitions. Second operand 4 states. [2019-10-07 17:16:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:33,873 INFO L93 Difference]: Finished difference Result 15383 states and 21803 transitions. [2019-10-07 17:16:33,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:33,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2019-10-07 17:16:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:33,970 INFO L225 Difference]: With dead ends: 15383 [2019-10-07 17:16:33,970 INFO L226 Difference]: Without dead ends: 10532 [2019-10-07 17:16:34,020 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:16:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10532 states. [2019-10-07 17:16:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10532 to 8046. [2019-10-07 17:16:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8046 states. [2019-10-07 17:16:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 11400 transitions. [2019-10-07 17:16:34,763 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 11400 transitions. Word has length 114 [2019-10-07 17:16:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:34,763 INFO L462 AbstractCegarLoop]: Abstraction has 8046 states and 11400 transitions. [2019-10-07 17:16:34,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 11400 transitions. [2019-10-07 17:16:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-07 17:16:34,782 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:34,783 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:34,783 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:34,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:34,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1778376072, now seen corresponding path program 1 times [2019-10-07 17:16:34,784 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:34,784 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:34,784 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:34,784 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-07 17:16:34,907 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:34,907 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:34,907 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:34,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:34,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:34,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:34,909 INFO L87 Difference]: Start difference. First operand 8046 states and 11400 transitions. Second operand 3 states. [2019-10-07 17:16:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:35,747 INFO L93 Difference]: Finished difference Result 22248 states and 32246 transitions. [2019-10-07 17:16:35,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:35,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-10-07 17:16:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:35,851 INFO L225 Difference]: With dead ends: 22248 [2019-10-07 17:16:35,851 INFO L226 Difference]: Without dead ends: 14219 [2019-10-07 17:16:35,914 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2019-10-07 17:16:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 10886. [2019-10-07 17:16:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10886 states. [2019-10-07 17:16:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10886 states to 10886 states and 15656 transitions. [2019-10-07 17:16:37,278 INFO L78 Accepts]: Start accepts. Automaton has 10886 states and 15656 transitions. Word has length 176 [2019-10-07 17:16:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:37,279 INFO L462 AbstractCegarLoop]: Abstraction has 10886 states and 15656 transitions. [2019-10-07 17:16:37,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10886 states and 15656 transitions. [2019-10-07 17:16:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 17:16:37,300 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:37,300 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:37,300 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash -219056969, now seen corresponding path program 1 times [2019-10-07 17:16:37,301 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:37,301 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:37,301 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:37,302 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-07 17:16:37,423 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:37,423 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:37,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:16:37,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-07 17:16:37,722 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-07 17:16:38,055 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:16:38,055 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:16:38,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:38,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:38,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:16:38,057 INFO L87 Difference]: Start difference. First operand 10886 states and 15656 transitions. Second operand 4 states. [2019-10-07 17:16:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:39,949 INFO L93 Difference]: Finished difference Result 32369 states and 50153 transitions. [2019-10-07 17:16:39,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:39,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-07 17:16:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:40,195 INFO L225 Difference]: With dead ends: 32369 [2019-10-07 17:16:40,196 INFO L226 Difference]: Without dead ends: 21499 [2019-10-07 17:16:40,265 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:16:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21499 states. [2019-10-07 17:16:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21499 to 21358. [2019-10-07 17:16:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21358 states. [2019-10-07 17:16:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21358 states to 21358 states and 30804 transitions. [2019-10-07 17:16:41,815 INFO L78 Accepts]: Start accepts. Automaton has 21358 states and 30804 transitions. Word has length 177 [2019-10-07 17:16:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:41,815 INFO L462 AbstractCegarLoop]: Abstraction has 21358 states and 30804 transitions. [2019-10-07 17:16:41,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 21358 states and 30804 transitions. [2019-10-07 17:16:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 17:16:41,851 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:41,851 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:42,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:42,056 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1169382724, now seen corresponding path program 1 times [2019-10-07 17:16:42,058 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:42,058 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:42,058 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:42,058 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-07 17:16:42,153 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:42,153 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:16:42,153 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:16:42,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:42,155 INFO L87 Difference]: Start difference. First operand 21358 states and 30804 transitions. Second operand 3 states. [2019-10-07 17:16:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:44,356 INFO L93 Difference]: Finished difference Result 57957 states and 85753 transitions. [2019-10-07 17:16:44,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:16:44,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-07 17:16:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:44,531 INFO L225 Difference]: With dead ends: 57957 [2019-10-07 17:16:44,531 INFO L226 Difference]: Without dead ends: 36616 [2019-10-07 17:16:44,737 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:16:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36616 states. [2019-10-07 17:16:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36616 to 31366. [2019-10-07 17:16:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31366 states. [2019-10-07 17:16:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31366 states to 31366 states and 45087 transitions. [2019-10-07 17:16:46,592 INFO L78 Accepts]: Start accepts. Automaton has 31366 states and 45087 transitions. Word has length 177 [2019-10-07 17:16:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:46,593 INFO L462 AbstractCegarLoop]: Abstraction has 31366 states and 45087 transitions. [2019-10-07 17:16:46,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:16:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 31366 states and 45087 transitions. [2019-10-07 17:16:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 17:16:46,638 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:46,639 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:46,639 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:46,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:46,639 INFO L82 PathProgramCache]: Analyzing trace with hash -961391972, now seen corresponding path program 1 times [2019-10-07 17:16:46,640 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:46,640 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:46,640 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:46,640 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-07 17:16:46,761 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:46,762 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:47,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:16:47,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 17:16:47,250 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-07 17:16:47,421 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:16:47,421 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:16:47,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:16:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:16:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:16:47,423 INFO L87 Difference]: Start difference. First operand 31366 states and 45087 transitions. Second operand 4 states. [2019-10-07 17:16:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:16:50,940 INFO L93 Difference]: Finished difference Result 93226 states and 142169 transitions. [2019-10-07 17:16:50,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:16:50,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-07 17:16:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:16:51,258 INFO L225 Difference]: With dead ends: 93226 [2019-10-07 17:16:51,258 INFO L226 Difference]: Without dead ends: 61876 [2019-10-07 17:16:51,855 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:16:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61876 states. [2019-10-07 17:16:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61876 to 61119. [2019-10-07 17:16:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61119 states. [2019-10-07 17:16:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61119 states to 61119 states and 87853 transitions. [2019-10-07 17:16:56,392 INFO L78 Accepts]: Start accepts. Automaton has 61119 states and 87853 transitions. Word has length 177 [2019-10-07 17:16:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:16:56,393 INFO L462 AbstractCegarLoop]: Abstraction has 61119 states and 87853 transitions. [2019-10-07 17:16:56,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:16:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 61119 states and 87853 transitions. [2019-10-07 17:16:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-07 17:16:56,465 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:16:56,465 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:16:56,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:56,671 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:16:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:16:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 27419066, now seen corresponding path program 1 times [2019-10-07 17:16:56,672 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:16:56,672 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:56,672 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:56,672 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:16:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:16:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-07 17:16:56,793 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:16:56,793 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:16:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:16:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:16:56,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:16:57,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:16:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:16:57,051 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:16:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-07 17:16:57,502 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:16:57,503 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-10-07 17:16:57,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:16:57,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:16:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:16:57,504 INFO L87 Difference]: Start difference. First operand 61119 states and 87853 transitions. Second operand 3 states. [2019-10-07 17:17:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:17:02,393 INFO L93 Difference]: Finished difference Result 115250 states and 169951 transitions. [2019-10-07 17:17:02,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:17:02,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-07 17:17:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:17:02,818 INFO L225 Difference]: With dead ends: 115250 [2019-10-07 17:17:02,819 INFO L226 Difference]: Without dead ends: 85903 [2019-10-07 17:17:03,191 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:17:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85903 states. [2019-10-07 17:17:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85903 to 80047. [2019-10-07 17:17:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80047 states. [2019-10-07 17:17:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80047 states to 80047 states and 114757 transitions. [2019-10-07 17:17:08,558 INFO L78 Accepts]: Start accepts. Automaton has 80047 states and 114757 transitions. Word has length 181 [2019-10-07 17:17:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:17:08,558 INFO L462 AbstractCegarLoop]: Abstraction has 80047 states and 114757 transitions. [2019-10-07 17:17:08,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:17:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 80047 states and 114757 transitions. [2019-10-07 17:17:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 17:17:08,676 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:17:08,677 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:17:08,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:17:08,881 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:17:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:17:08,883 INFO L82 PathProgramCache]: Analyzing trace with hash 461912545, now seen corresponding path program 1 times [2019-10-07 17:17:08,883 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:17:08,884 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:08,884 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:08,884 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:17:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-07 17:17:08,989 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:08,989 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:17:08,990 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:17:08,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:17:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:17:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:17:08,991 INFO L87 Difference]: Start difference. First operand 80047 states and 114757 transitions. Second operand 3 states. [2019-10-07 17:17:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:17:16,665 INFO L93 Difference]: Finished difference Result 219500 states and 324760 transitions. [2019-10-07 17:17:16,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:17:16,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-07 17:17:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:17:17,218 INFO L225 Difference]: With dead ends: 219500 [2019-10-07 17:17:17,218 INFO L226 Difference]: Without dead ends: 139470 [2019-10-07 17:17:18,507 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:17:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139470 states. [2019-10-07 17:17:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139470 to 133503. [2019-10-07 17:17:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133503 states. [2019-10-07 17:17:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133503 states to 133503 states and 190807 transitions. [2019-10-07 17:17:29,887 INFO L78 Accepts]: Start accepts. Automaton has 133503 states and 190807 transitions. Word has length 177 [2019-10-07 17:17:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:17:29,888 INFO L462 AbstractCegarLoop]: Abstraction has 133503 states and 190807 transitions. [2019-10-07 17:17:29,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:17:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 133503 states and 190807 transitions. [2019-10-07 17:17:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-07 17:17:29,936 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:17:29,937 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:17:29,937 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:17:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:17:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1993343667, now seen corresponding path program 1 times [2019-10-07 17:17:29,937 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:17:29,938 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:29,938 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:29,938 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:17:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:17:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-07 17:17:30,075 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:17:30,075 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:17:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:17:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:17:30,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:17:30,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:17:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-07 17:17:30,412 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:17:30,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:30,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:30,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:30,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:17:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-07 17:17:30,754 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:17:30,755 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 7] total 16 [2019-10-07 17:17:30,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:17:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:17:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-07 17:17:30,759 INFO L87 Difference]: Start difference. First operand 133503 states and 190807 transitions. Second operand 9 states. [2019-10-07 17:17:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:17:56,625 INFO L93 Difference]: Finished difference Result 396713 states and 608598 transitions. [2019-10-07 17:17:56,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 17:17:56,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-07 17:17:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:17:57,550 INFO L225 Difference]: With dead ends: 396713 [2019-10-07 17:17:57,550 INFO L226 Difference]: Without dead ends: 263227 [2019-10-07 17:17:59,795 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-10-07 17:17:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263227 states. [2019-10-07 17:18:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263227 to 261516. [2019-10-07 17:18:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261516 states. [2019-10-07 17:18:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261516 states to 261516 states and 397584 transitions. [2019-10-07 17:18:24,650 INFO L78 Accepts]: Start accepts. Automaton has 261516 states and 397584 transitions. Word has length 178 [2019-10-07 17:18:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:18:24,650 INFO L462 AbstractCegarLoop]: Abstraction has 261516 states and 397584 transitions. [2019-10-07 17:18:24,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 17:18:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 261516 states and 397584 transitions. [2019-10-07 17:18:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-07 17:18:24,705 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:18:24,705 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:18:24,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:18:24,910 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:18:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:18:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2004510676, now seen corresponding path program 1 times [2019-10-07 17:18:24,911 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:18:24,912 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:18:24,912 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:18:24,912 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:18:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:18:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:18:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-07 17:18:25,022 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:18:25,022 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:18:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:18:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:18:25,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:18:25,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:18:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:18:25,390 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:18:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-07 17:18:25,612 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:18:25,613 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-10-07 17:18:25,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:18:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:18:25,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:18:25,615 INFO L87 Difference]: Start difference. First operand 261516 states and 397584 transitions. Second operand 3 states. [2019-10-07 17:18:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:18:52,193 INFO L93 Difference]: Finished difference Result 496231 states and 767328 transitions. [2019-10-07 17:18:52,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:18:52,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-07 17:18:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:18:52,965 INFO L225 Difference]: With dead ends: 496231 [2019-10-07 17:18:52,965 INFO L226 Difference]: Without dead ends: 305911 [2019-10-07 17:18:57,418 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:18:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305911 states. [2019-10-07 17:19:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305911 to 301996. [2019-10-07 17:19:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301996 states. [2019-10-07 17:19:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301996 states to 301996 states and 450962 transitions. [2019-10-07 17:19:38,111 INFO L78 Accepts]: Start accepts. Automaton has 301996 states and 450962 transitions. Word has length 181 [2019-10-07 17:19:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:19:38,112 INFO L462 AbstractCegarLoop]: Abstraction has 301996 states and 450962 transitions. [2019-10-07 17:19:38,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:19:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 301996 states and 450962 transitions. [2019-10-07 17:19:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-07 17:19:38,148 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:19:38,148 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:19:38,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:19:38,349 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:19:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:19:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1309074469, now seen corresponding path program 1 times [2019-10-07 17:19:38,350 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:19:38,351 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:19:38,351 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:19:38,351 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:19:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:19:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:19:39,010 WARN L191 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2019-10-07 17:19:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-07 17:19:39,066 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:19:39,066 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:19:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:19:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:19:39,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:19:39,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:19:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-07 17:19:39,469 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:19:39,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:39,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:39,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:39,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:19:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-07 17:19:39,799 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:19:39,799 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7] total 17 [2019-10-07 17:19:39,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 17:19:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 17:19:39,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-10-07 17:19:39,800 INFO L87 Difference]: Start difference. First operand 301996 states and 450962 transitions. Second operand 9 states. [2019-10-07 17:21:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:21:02,047 INFO L93 Difference]: Finished difference Result 919284 states and 1473748 transitions. [2019-10-07 17:21:02,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 17:21:02,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 180 [2019-10-07 17:21:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:21:23,133 INFO L225 Difference]: With dead ends: 919284 [2019-10-07 17:21:23,134 INFO L226 Difference]: Without dead ends: 617305 [2019-10-07 17:21:44,217 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2019-10-07 17:21:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617305 states.